Enhancing photocatalytic activity of ZnO nanostructures by doping with Ce+4 ions prepared in water using ultrasonic irradiation
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Amir Omidi
Abstract
Ultrasound was applied for preparation of ZnO nanostructures doped with different Ce/Zn ratios in water by irradiation for 60 min. In this method, zinc acetate, cerium sulfate and sodium hydroxide were used as starting materials without using any organic additives or post preparation treatments. Powder X-ray diffraction patterns indicate that the nanostructures are excellently crystallized in the form of wurtzite hexagonal phase. Scanning electron microscopy and transmission electron microscopy images show that the morphology of the nanostructures changes by doping with Ce+4 ions. The presence of the elements in the nanostructures was verified by energy dispersive X-ray spectroscopy. The UV–vis diffuse reflectance spectra of the nanostructures are similar to each other and they have a maximum at about 361 nm. The nanostructures with 0.025 mole fraction of Ce+4 ions exhibit the highest activity for degradation of methylene blue under UV irradiation. The reaction rate constant decreases with calcination temperature. Moreover, the rate constants in more acidic and alkaline solutions are lower than those of the neutral conditions. The photocatalyst retains 90 % of activity after being used four times.
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© 2014, Carl Hanser Verlag, München
Artikel in diesem Heft
- Contents
- Contents
- Original Contributions
- Twinning dislocation and twin propagation process in a nickel-base single crystal TMS-82 superalloy
- Relationship between austenite stability and martensite formation in modified 9Cr-1Mo steel
- The influence of brazing temperature and surface roughness on the wettability of reactive brazing alloys
- Thermodynamic modelling of the “Cu2O”–SiO2, “Cu2O”– CaO, and “Cu2O”– CaO – SiO2 systems in equilibrium with metallic copper
- The effect of annealing temperature on the corrosion behavior of silver alloyed 2205 duplex stainless steel
- Effect of rate of deformation on electromagnetic radiation during quasi-static compression of sintered aluminium preforms
- Temperature effect on decorative gold coatings obtained from electrolyte based on mercaptotriazole – comparison with cyanide
- High-strength and thermally stable Al – CeO2 composite produced by means of mechanical alloying
- Enhancing photocatalytic activity of ZnO nanostructures by doping with Ce+4 ions prepared in water using ultrasonic irradiation
- Modified hyperbranched epoxy/clay nanocomposites: A study on thermal, antimicrobial and biodegradation properties
- Short Communications
- Synthesis of carnallite crystal from KCl – MgCl2 solutions and its characterization
- Microwave synthesis of ultrafine and nanosized powders of tungsten oxide and carbide
- DGM News
- DGM News
Artikel in diesem Heft
- Contents
- Contents
- Original Contributions
- Twinning dislocation and twin propagation process in a nickel-base single crystal TMS-82 superalloy
- Relationship between austenite stability and martensite formation in modified 9Cr-1Mo steel
- The influence of brazing temperature and surface roughness on the wettability of reactive brazing alloys
- Thermodynamic modelling of the “Cu2O”–SiO2, “Cu2O”– CaO, and “Cu2O”– CaO – SiO2 systems in equilibrium with metallic copper
- The effect of annealing temperature on the corrosion behavior of silver alloyed 2205 duplex stainless steel
- Effect of rate of deformation on electromagnetic radiation during quasi-static compression of sintered aluminium preforms
- Temperature effect on decorative gold coatings obtained from electrolyte based on mercaptotriazole – comparison with cyanide
- High-strength and thermally stable Al – CeO2 composite produced by means of mechanical alloying
- Enhancing photocatalytic activity of ZnO nanostructures by doping with Ce+4 ions prepared in water using ultrasonic irradiation
- Modified hyperbranched epoxy/clay nanocomposites: A study on thermal, antimicrobial and biodegradation properties
- Short Communications
- Synthesis of carnallite crystal from KCl – MgCl2 solutions and its characterization
- Microwave synthesis of ultrafine and nanosized powders of tungsten oxide and carbide
- DGM News
- DGM News
